Call-sending device



MANDERSEN.

CALL SENDING DEVICE.

APPLICATION man was. 1914.

1,391,442. I Pawnwdsept. 20,1921.

3 SHEETS-SHEET JVVE/VTOR. HLBERTH/VMRSE/y Q WTTOR/Vif A. ANDERSEN.- cm SENDING DEVICE.

APPLICATIQN FILED AUG-B, I914.

Patented Sept. 20,- 1921.

a sn'tns-suzn 2.

JTTOR/VEYS,

A. ANDERSEN.

CALL- SENDING DEVICE.

APPLICATION FILED AUG-8| m4.

1,391,442. PatentedSept. 20,1921.

' r 3 SHEETS-SHEET a.

Q I IMMIIIHI JZ/VVENTOR: KLBERTH/VDERSEM UNITED "STATES,

"PATENT FF E BERT ANnI RsEN, or CHICAGO, ILLINOIS, AssIGNoR TO AUTOMATIC; ELE T Q COMPANY, or CHICAGO, ILLINOIS, A CORPORATION or I INOIS;

, CALL-SENDING DEVICE.

To all whom it may concern:

citizen of the UnitedStates of America, and

resident of Chicago, Cookcounty, Illinois, have invented certain new and useful Improvements in Call-Sending Devices, of which the following is a specification.

My invention relates to improvements in call-sending devices and consists in the provision of a plurality of impulse transmitters controlled by a'single keyboard.

My invention is particularly adapted for use in connection with automatic telephone systems in which the called subscribers number consists ofa plurality of digits, and inaccordance with my invention I provide as many impulse transmittersas there are digits in the called number, I then provide a single keyboard under the'control or" the operator and mechanism'whereby the operation of the various keys of this board will successively bring theimpulse transmitters intooperation. I o a My invention will be more clearly'understood by reference to the accompanying drawings, inwhichI have illustrated one particular embodiment of my invention.

n the. drawings Figure 1 represents a front side view of a call-sending deviceeme bodying the features of my invention, show- Ing certainpartsremoved so as toymore clearly show the i'n'terior'construction.

Fig.2 is a back view of a portion ofthe same. Y

. Fig. 3 is a sectional view taken on the line 3-3inFig.2.

Fig. 4: represents the top-of a portion of the keyboard associated with the call-sending deviceshown in Figs. 1, 2 and 3. Fig. 5 is a side View of the same, showing the springs controlled by each push button or ke H 6 is a bottom view of said keyboard. Fig. 7 is a diagrammatic circuit view of the keyboard and the call-sendingdevice. Referring toiFigs'. 1,2 and 3, the callsending device shown consists of three units or impulse transmittersX, Y and Zthat is, p

one for each digit ofthe number to. be

called-butit is readily seen that any numher ofunits orimpulsetransmitters may be grouped together to form one call-sending ciated with each transmitter is a! springs ffas'tened tothe base p ate by i Specification of Letters Patent. PatefitediSptQZO, 192 1,

' Application filed Au ust 8,1914. Serial No. 855,826.

V device,.depending'upon the number of digits in the called number.-

Referring to the unit X, among other details, are a plurality of solenoids a, a a

etc, circularlyv nounted between the plates IC and'D. Each solenoid is provided with "a plunger 11 which, when attracted, protrudes through the plate D in the path of theplungers of the solenoids a, a et c., protrude when attracted. The third calling dethe arm The second calling device Y is l shown with the plate C-removed, illustratmg the holes in the plate D through which vice Z is illustrated with both the 'plateslC and D removed, showing aithird plate P through which projects a shaft 20. To the end of said shaft is secured a disk l5 and the arm 12. These devices are -mounted alongside each other on the base'plate 10.

1 Fig. 2 shows theassembly of one of the callingdevices at the back of said base plate,- together with a solenoid 16 which,when;energized, attracts its plunger 1 7 and by means of alink v18 operates the lever 19 against the tension-of the spri'ng21. On the end of the lever 19 is the segment of a gear wheel 22 in mesh with a gearwheel 23. The said gear wheel is secured to the shaft 20, which' is 'gournaledatone end in the plate P and at the other end in the bridge piece 25. To the under side of the disk 15is secured a pawl 26, its function beingto engage with the ratchet wheel 27 which is attached to the gear wheel 28. This gear wheel is loosely mounted on theshaft and is in mesh with "a smaller gear wheel 29 which is on the same shaft as the impulse cam 30 and the wheel 31. The whe'el'31 meshes with the worm connected with the governor 32. WVith each I spring .56, the function of which is to lock means of a bracket 41 and insulated from eachother and from thel frame by suitable insulating material.

Associated with the keyboard, and with the unit or transmitter No. 1 i (Fig. 7 is a group of inter-related relays. Th relay 43 controls the contacts of the. pairs of springs 44 and 45 and the operation of the retaining vpawl 54. The retaining pawl 54, when "in" its normal position, prevents the shaft'55-= from-rotating. Attached to one end of the armature .48 of the relay 47 is a locking e armature 46 deals relay 43in an operated position-after the relay 43 has once op'-- verated and releases the, same when the said I relay 47 is energized. Attached to the opeferring to illustrated a section of thefkeyboard, together with the assembly of the contact springs to close the necessary clrcuits to v posite end ofthe armature 48 is a retaining pawl '49 which engages the teeth of a ratchet wheel 50, which latter operates to retain the said ratchet wheel in an operated poslt on.

Attached to the armature 52 of the relay 53 is a driving pawl 58, the function ofwhich is to rotate the ratchet wheel step by step over the contact points 51; This causes the wiper 59 to supply battery current to' the various units through its contact points {51 as the said wiper is'rotated over them by step. 7 V r Figs. 4, 5and 6, there is there ..initiate a call. Fig;' 6 is a view of the under sideof the keyboardtshowing the contact springs 60, wh1ch are 1n a group of three. The ends of these spr ngs are shown in Fig.-

5 andare pressed together when their correspondingvkey 61 is depressed The springs 62 and 63- are closed by the depression of any one of the keys 61 in the following rnanner: Uponthc depression of one ofthe keys 61a projection jG iattached to said key is qforced between two, of the steel balls 65, forcingthem apart and acting on a lever 66,

' which in turn forces together the springs 62 the frame.

and 63. These springs remain in their op- 'eratcd'position by means of a. detent arrangementfon the endhof the spring 67 until the start-'key'68 is depressed when it; moves said spring. 67 out of engagement with. the lever 66, which lever releases and ,allows the contact springs 62 and G3 to be separated.

path of the pin'which is controlled by the steel ,balls andar bushing vv hich presses against, the spring. 62. The other end of contact.

Onev end of this lever is provided with ajlng wh ch extends into the.

this lever is adapted when rotated about its axis to fall behind the detent'on the end of the spring 67 'to hold it in its operated position. Thestartkey 68 is located back of the support-l66 and is provided with an insulated washer-which normally rests against the frame and when the key is pressed forces the'springs 69 'and 70 into Thelower end of this key when:

pressed passes over an opening in the bridge 68 and engagesthe detent on the end of thespring 67 "to release said spring from engagement with the lever 66an'd to allow the lever 66'to be restored to itsnormal position by the tension of the spring 62.

Having g ven a detailed description of 1 the component parts; Twill now describe the mechanical and electrical operations which take place when a call is initiated, referring moreparticularly to the diagrammatic view. As hereinbefore stated,

shown. in 7 there is mounted on the base plate a plurality of units or transmitting devices.

There are as many of these devices as there are digits in H e telephone numbers in the system'in whichthe apparatus is used. As

shown in the diagrammatic view F 7, the

ratchet wheel '50 is arranged to'take care of r a five digitnumber, while vonly three units ,or transmitting devices are'shown.

We will assumethat the operator wishes to call a subscriber whose number is'h45678.

She therefore depresses the 'keys4, 5, 6, 7 andS in 'q uick succession, which return to their normal positionsi nmediately upon the removal of her finger by the tension of the springs 6O,- which are momentarily pressed together- Uponthe digit key 4 being. de

pressed," three: circuits are .closed, one

.through the solenoids a and '16 (associated with the first unit) from ground G? through ,the springs of the key 4, solenoidaflsolenoid l6,contact 51 (associated with thefirst unit) and the wiper 59 t0 the battery l5",v The sec-- 1 0nd circuit extends from ground Grfv through the same springs to thejmagnet 53. The

1 third circuitextends from ground G through the springs G S and .62 and the supervisory lamp 72 to battery B. The latter circuit is a supervisory circuit and is to indicate that one or more of the calling .keys havej been depressed, but not the start key, forwe have already, seen that when the start. key 68 is depressed the contactsprings 62'. and 63 are 7.

released. Upon the energization of the soletil it is sto ped by the arm 12 coming into contactwit the plunger of the solenoid 41*,

whereby the ratchet 26 will be advanced past a number ofjn'otchesin the wheel 27 corresponding to the digit 4. :The relay 53,

upon'energizing places the pawl 58 in a position to rotate theratchet wheel one step as soon as its circuit is broken and it deenergizes. The pawl 54 retains the unitlf p noids a and 16, the shaft 20 is revolved unin its operated position.- Upon the key 5 being depressed, it closes the contact of springs 60 associated with it in the same manner as the key-4; The operations of the solenoids a and 16 and the apparatus of the second'unit or impulse transmitter are the same. as for the apparatus of the first unit.

' Upon the'depression of the keys 6, 7 and 8,

the'individual units or impulse transmitters Wlll respond 1n the same manner as above 7 described.

As soon as the solenoid of the unit 1 is energized, a circuit is closed through the relay of the second unit, thereby causing the said relay to energize and prevent the operation of unit No. 2 before'unit No. 1 has operated. This circuit extends from ground G through the said relay 35 and the springs to battery B. Theabove is' 63 which control the supervisory lamp 72. The circuit for therelay43 extends from. ground G through the contact. of springs 69 and 70 and the said relay 43 to battery B.

The relay43, upon energizing, locks its armature 46 under'the spring 56 of the 'armature 48, and operates to release the shaft 55 of the first unit by withdrawing the retainthe start supervisory lamp 73. This latter circuit extendsfrom. ground G through'the said lampand the springs 45 to battery B.

As soon as the pawl '54 is removed from on gagement withthe wheel 29, the spring 21 operates to, restore the plunger of the solenoid '16 of the firstunit to normal. As the plunger returns to normal, the ratchet 26 engages with the notch in'the ratchetwheel i 27, to which said ratchet has advanced by the energization of the solenoid, and forces the wheel127 to rotate back with the shaft 20. Through the medium of the spur teeth 28 and the pinion 29 this rotation is transmitted to the shaft on which is fastened the impulse cam30. The cam 30revolves to open and close the impulse springs 79 and four times, thereby transmitting that number of impulses over the line conductors 7-4 and 7 5 leading to the central oflice appa-,

As soon'as the solenoid 16 of unit *N0. 1 returns to normal itssprings 40 are 1 opened, thereby opening the circuit of the ratus.

relay 35 of the second unit. The relay 35 being slow to energize allows the central oflice apparatus time to operate before the second unit isset in motion to transmitthesecond series of impulses. This second unit pawl 54 and also closes a circuit through operates to then open the circuit of the relay 35 of the third unit after it has transmitted the second series :of impulses, etc, until the solenoid 16 of the last unit denergizes, whereby the circuitof the release relay 47 is closed. This circuit extends from ground G through the said relay, contact of springs 44 and the springs 40 of the last unit to battery B. Therelay 47, upon energizing, removes the pawl 49 from 'en 'gagement withxthe ratchetwheel 50 for a long enough time toallow the said ratchetwheel to-return to normal and unlocks the relay 43, which, upon releasing its armature, opens the circuit of the start supervisory lamp '73 at the springs 45 and opens the circuit of the relay 47 at the springs 44. The extinguishing of the lamp 73.notifies the operator that the calling device may now be used to establish another call. 1

The impulses transmitted. by each unit are at a uniform rate of speed, as the governor 32 controls the direct operation of the shaft 55 upon which the impulse cam 30 is mounted. The timeinterval between the impulses for each digit iscontrolled by thedifferent relays 35in such a manner thatit is impossible for more than one unit to transmit i-mpulses :at one time.

It will thus be seen that I have devised a very efficient form of call. -sending device 7 which consists. of aplurality of impulse transmitters but of only one keyboard. The impulses transmitted overithe trunk line -to the switches in the automatic'telephone exchange are at a uniform speed and are properly spaced apart so as to secure the proper operation of the automatitc switches wlth whiclrthis call-sending devicewill be asso-' ciated'.

-While I have illustrated and described one embodiment of my invention, it is to be understood that I do not wish to be limited to the exact construction shown and described. 1

lVhat I claim as my invention is 1. A call-sending device comprising a plurality of impulse transmitters, a. single controlling mechanism for successively controlling theoperation of said transmitters,said

transmitters operating thereafter to transmit impulses. 7

2. In a call-sending device, a plurality of impulse transmitters, a single keyboard for successively operatingv said transmitters, said transmitters, operating" automatically to transmit impulses after all are operated by said keyboard. r v p In a call-sending device, a plurality of impulse transmitters, a plurality of keys underthe control of the'operator, means .for

successively bringing said impulse transmit ters under the control of said keys, means controlled by the operation of said keys'for' setting said impulse transmitters in operated position, and means for then successively operating said transmitters to transmitv a ters,.jof a group of setting keys common to' plurality of series of impulses.

4. In a call-sending dev1ce,,a plnraltiy of impulse transmitters, a set of operating keys,

a side switch, and meanscontro'lle'd by said side switch for successively bringing said impulse transmitters'under the control'of I said keysi 5. Inv a call-sending device, a plurality of I impulse transmitters, aplurality of operating keys, a side switch, means'controlled by I le switch .forisuccessively brlnging 1d mipulse transmitters under the controlsaid keys, means controlled by. said keys for settingfsaid transmitters in Operative position, means for then successively oper- 7 In a controlling apparatus, the combination with a plurality of impulsetransmitsaid transmitters, and means whereby said transmitters may be separately set through successive operations of any one of sa d keys,

each transmitter maintained in set positionuntil allare set.

8. In a controlling apparatus, the combination with a plurality of impulse transmitters, of a group; ot-setting keys common to 1 said transmitters, means operated upon a firstactuationiof any one of said keys for setting .a' first one of said transmitters, and means operated upon a second actuation of the same or another key for setting a second one of said transmitters, before the first transmitter has operated tosend impulses.

9. In a controllingapparatus, the combination with a plurality of impulse transmitters, of a group-of setting keys common to said transmitters, each key corresponding to a particular digit, and a plurality otmeans operated in turn upon successive actuations of said: keys forseparately setting said transi-tters in accordance-with the digits indi cated by the actuated keys, said transmitters operating to send jimpulsesfonly after all I i have been set.

1.0. In a controlling apparatus, the c0mbi-' nation with a plurality of mpulse transmitsaid transmitters, a setting meansflfor each ters, of a group of: setting keyscommon to transmitter, all of said meansnormally in- -operative-eXcept the first. one, and a' device whereby upon successive actuations of said:

keys said setting means are successively renof serially related contact-sets for controldered operative, said transmitters operating after being set .to-transmit; impulses. V

1i. In a 'co ntroll1ng apparatus,,the combination with a plurality pol impulse transmitters, of pluralityotlsetting means, one for each transmitter, a group oi setting keys normally adapted to .coii'trol a iirstione of said setting means, and a device whereby after the actuation of one of said'ke ys the:

control isshitted to another setting means, said transmitters cperatmg after beingiset to transmlt impulses. r

In combination, a circuit, aplurality of serially related contact senior-control ling said circuit, an electromagnetic device associated ith each contact set for operating the same, and a .group"o'f controllingkeys commonto said devices.

,fiifi. In,coinbination, a c1rcu1t,'a plurality lingsaid circuit, an-electro-magnetic device associated ,with eachcontact set for operating the same, agroup. of controlling keys commcn torsaid devices, and anjantomatie switching mechanism whereby 'saidjdevices may be controlled successively through the i-nediuinofsaid keys. I i V 14. In a call sending device a plurality of impulse transmitters, a conirrionf group of setting keys and vmechanism controlled thereby 'foijsettin'g said transmitters oneatterthe other,flocki ng means for, each transinitter, all. trend means normallytinoperative except the'one associated with the first trai-nsmitter, andilneans whereby each trans-I mitter when set renders .tlie ,loclring means associated with the nexttransmitter efiec tive; r 1

15.1Infa call sending device, a plurality-jot impulse transmitters,l, a' commo l gr'o'up of. setting keys and mechanism controlled there- .bV 'fOi setting saidqtrans'mitters one aiter the other, lockingfmeans'fiior each transmitter, allof said means'norma'lly lno'peratlve except the one associated with the first transmitter, means: whereby each transmitter when set renders. the locking means associated with the V and means controlled a'manual key for unlocking the said'firsttransmitter. v

16. In a call. sending device, a plurality of impulse trans1nitters,a group of setting keys common to said transmitters, means whereby -said transmitters may be separately setby successive operations of one or more of said keys, means for lockingeachf transmitter in next transmitter effective,

set position, and meansifor" unlocking the transmitters to 'permit'them to send. im-' pulses. 17; In call sendingdevijce, a plurality of impulse transmitters, group of setting keys commonto said transmitters, means whereby said transmitters may be separately set by successive operations of'one'or more ofsaid keys, means for locking each transmitter in set position, and means controlled, by a manualkey for unlocking a first one of said transmitters to permit the sameto operate.

ter in set position, means controlled by a manual key for unlocking a first one of said transmitters to permit the same to operate, and means controlled by each transmitter after its operation for unlocking the next.

19. In a call sending device, a plurality of locking impulse transmitters, a common roup of setting keys and mechanismcontrolled thereby for settingsaid transmitters separately, and means for unlocking the first one of said transmitters whereby it may perform its impulse sending function While returning to normal.

20. In a call sending device, a plurality of locking impulse transmitters, a common group of setting keys and mechanism controlled thereby for setting said transmitters separately, means for unlocking the first one of said transmitters whereby it may perform its impulse sending function while returning to normal, and means controlled by each transmitter except the last whereby upon its return to normal the next transmitter is unlocked.

.21. In a call of locking impulse transmitters, a common group of setting keys, mechanism including an automatic switch controlled by said keys for setting said transmitters one after the other, means for unlocking a first one of said transmitters whereby it may perform its impulse sending function while returning to normal, separate means controlled by each transmitter except the last whereby upon its return to normal the next transmitter is unlocked, and means controlled by the last transmitter for releasing said automatic switch. 7 v

22. In a call sending device, a plurality of impulse transmitters, setting means for each transmitter, and a plurality of magnets for each setting means for regulating the setting operation thereof, a single set of keys for controlling the setting mechanism of all the transmitters, said transmitters operating after being set to transmit impulses.

23. In a call sending device, a plurality of impulse transmitters, setting means for each transmitter variably operable to set its associated transmitter in accordance with any one of a plurality of digits, and a plurality of magnets associated with each setting means to control the variable operation thereof, each magnet corresponding to a particular digit, a single set of keys for controlling the setting mechanism of all the sending device, a plurality.

transmitters, said transmitters operating af- 7 ter being set to transmit impulses.

Qt. In a'call sending device, .a plurality" of impulse transmitters, setting means for each transmitten-a plurality ofmagnets for each setting means for regulating the setting operation thereof, and a group of controlling keys common to all of said magnets. I i

25. In a call sending device, a plurality of impulse transmitters, setting means for each transmitter variably operable to set its associated transmitter in accordance with any 1 one of a' plurality of digits, a plurality of magnets associated with each setting means to control the variable operation thereof, each magnet corresponding to ;a particular digit, and a group of controlling keys com mon to all of said magnets. V

26. In a call sending device, a plurality of impulse transmitters, setting meansfor each transmitter, a plurality of magnets for each setting means for regulating the setting op- Z 'eration thereof, a group of controlling keys common to allof said magnets,-and a switch ing devicefor shiftingthe control of said keys from one, plurality of magnets to another. v 7 j 27. In afcall sending device, a plurality of impulse transmitters, setting means for each transmitter variably operable to set its associated transmitter in accordance with any one of a pluralityof digits, a plurality of magnets associated with each setting means to control the variable operation thereof, each magnet corresponding to a par.' ticular digit, a group of controlling keys common to all of said magnets, and a switching. device for shifting the control of said keys from one plurality of magnets to another. r

28. In atelephone system, a sender comprising a plurality of controlling devices, a single set of digits keys, means responsive tothe successive operation of keys of said set for causing said controlling devices to. assume set positions corresponding to the keys depressed, anda series of mechanical switches governed in their operations by the subsequent movement of said controlling devices. Y

29. In a telephonesystem, a sender comprising a plurality of controlling devices, a single set of digits keys, a progression switch for associating said set with successive controlling devices upon the repeated actuation of said key set, and a series of mechanical switches governed in their operations by the subsequent movement of said controlling devices.

30. In a call sending device, a plurality of impulse transmitters, a single set of keys for setting said transmitters, and means for preventing the sending of impulses thereby until all of the transmitters are set. I

31. In a call sending device, a plurality of impulse transmitters, a single set of keys for setting said transmitters, and means for preventing th sending of impulses't'hereby until all of the transmitters are set, and

means controlled after the last transmitter is set for rendering said last means inefi'ective.

32. In acall sending device, a plurality of impulse transmitters, a'single set of keys for setting said transmitters, and means for preventing the sending of impulses thereby until all of the transmitters are set, a signal associated with said keys, means controlled by the operation of one of said keys for displaying said signal, another signal associated with said transmitters, and controlled by the final operation thereof for displaying said other signal.

33. In a call sending device, a plurality of impuls transmitters, a single set of keys for setting and locking said transmitters,

a lampassociated with said keys, means controlled by any one of said keys for lighting .said lamp, a manual key, means controlled, by said manual key for unlocking a first one of said transmitters to permit the same to operate, and means controlled by each transmitten after its operation for unlocking the next, a lamp associatedwith said transmitters, and lighted by the final operation thereof.

34. In a call sending device, a visible signal, a plurality of impulse transmitters,

means for setting said transmitters, means for preventing the sending of impulses thereby until all of the transmitters have been set, means controlled by the setting of one transmitter for displaying said signal,

and means controlled by the release of the I last of saidtransmitters.

last of said transmitters and effective upon the said last transmitters return to normal.

for displaying said signal.

36.1In a call sendingdevice, signal lamps, impulse transm1tters,'a set oi keys for set, ting and locking said transmitters, means for lighting one of said lamps upon setting one of said transmitters, a manual key, means controlled by said manual key for unlocking a first one of said transmitters; to permit the same to operate to send impulses, and to extinguish said lamp, means controlled by each transmitter after its operation for uni lookingthe next, and means for lighting an other of said lamps after the operation of the p 87. In a telephone system, a sender'com prising a plurality ofoontrolling devices, a single 'set of digits keys, a progression switch, and means responslve to the actuation of a key for causing a controlling de vice to assume a set position corresponding to the key actuated, for operating said progression switch to operatively associate said key With the succeeding controlling device, and a series of mechanical switches governed in their operations by the subsequent movement of said controlling devices. I

38. In a telephone system, a sender com prising a series of controlling devices, a single set of digits keys, a progression switch, means whereby" each time a key of said set is actuated, a controlling device will be caused to assume a set position corresponding to the key and said progression switch Will be moved to shift said key set to operative relation to the succeeding controlling' device, and a series of mechanical switches governed in their operations by the subsequent movement of said controlling devices.

Signed by me at Chicago, Cook county, Illinois, this 27th day ofJuly, 1914.

, ALBERT ANDERSEN Witnesses: s

1 G. Y-ANooKoWsKI, I

E. D. FALns, 

